【摘要】：隨著社會經(jīng)濟的快速發(fā)展，機動化水平的逐漸提高，，城市交通擁堵狀況以及交通安全事故頻發(fā)成為了亟待解決的問題，由此誕生了智能交通系統(tǒng)ξITSο，而車載自組織網(wǎng)絡(luò)在智能交通系統(tǒng)中具有舉足輕重的地位作為車載自組網(wǎng)重要的應(yīng)用場景之一，城市場景下的車載自組網(wǎng)由于城市中道路結(jié)構(gòu)，車輛密度，障礙物等因素顯現(xiàn)出了一些獨有的特征本文對城市場景下的車載自組織網(wǎng)絡(luò)消息傳遞最短路徑以及車輛之間安全距離進行了研究主要研究工作包括：第一基于城市場景道路網(wǎng)結(jié)構(gòu)的特點，車輛在城市道路中的行駛特征提出了消息傳遞沿道路方向的思路以處于路口的車輛及基礎(chǔ)設(shè)施作為研究對象，設(shè)計了適用于城市場景的車載自組織網(wǎng)絡(luò)消息傳遞策略，使用圖論中的Dijkstra算法求得城市中心地段車載自組網(wǎng)消息傳遞最短路徑第二基于現(xiàn)有車載自組織網(wǎng)絡(luò)移動模型自定義了適用于城市場景的車輛移動模型針對城市場景下行車安全問題研究了城市中各場景下的行車安全距離，在現(xiàn)有行車安全距離模型的基礎(chǔ)上進行調(diào)整和延伸，推導(dǎo)出了適用于各場景的行車安全距離計算模型第三基于車間安全距離提出了預(yù)警距離的概念，并用MATLAB對不同場景的車輛行駛過程進行了模擬，分析了預(yù)警距離對于最大限度防止車輛發(fā)生碰撞的重要意義
[Abstract]:With the rapid development of social economy and the gradual improvement of motorization level, urban traffic congestion and frequent traffic safety accidents have become an urgent problem to be solved. As a result, Intelligent Transportation system 尉 ITS is born. As one of the most important application scenarios of vehicular ad hoc networks, vehicular ad hoc networks in urban environments are characterized by the density of vehicles due to the structure of roads in the city, which plays an important role in the intelligent transportation system (its). Obstacles and other factors show some unique characteristics. This paper studies the shortest path of the vehicle-borne ad hoc network messaging and the safety distance between vehicles under the urban scene. The main research work includes: first, based on the city Characteristics of Road Network structure in Market View, The driving characteristics of vehicles in urban roads the idea of message passing along the road direction is put forward. The vehicle and infrastructure at the intersection are taken as the research objects, and a vehicle-borne ad hoc network messaging strategy suitable for urban scenes is designed. Using Dijkstra algorithm in Graph Theory to find the shortest path of message delivery in Urban Central vehicle Ad Hoc Network second based on the existing vehicle-mounted ad hoc network mobile model, the vehicle mobility model suitable for urban scene is customized for the city market. The problem of traffic safety in the scene is studied in this paper, and the distance of driving safety in every scene of the city is studied. On the basis of adjustment and extension of the existing traffic safety distance model, the calculation model of traffic safety distance suitable for each scene is derived. Thirdly, the concept of early warning distance is proposed based on workshop safety distance. The vehicle driving process in different scene is simulated by MATLAB, and the significance of warning distance to prevent vehicle collision is analyzed.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U495;U463.67

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